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    High-speed electro-optic modulator
    2.
    发明授权
    High-speed electro-optic modulator 失效
    高速电光调制器

    公开(公告)号：US06404538B1

    公开(公告)日：2002-06-11

    申请号：US09695538

    申请日：2000-10-24

    申请人： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

    发明人： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

    IPC分类号： G02F100

    CPC分类号： G02F1/055 ,  G02F1/0555 ,  G02F1/0556 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

    摘要： An optical modulator is provided to control the intensity of a transmitted or reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with low polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotator. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high speed modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.

    摘要翻译： 提供光调制器以控制透射或反射光的强度。 在透射模式中，分离器将任意偏振光分离成两个偏振光，一个偏振光从另一个行进。 重组器会导致两条射线在输出端重新组合，除非电光相位延迟器改变两个射线的极化，在这种情况下，它们都将输出误差减去延迟器上的电压的函数。 通过改变重组器的取向，获得具有低偏振模色散的常关型。 使用无源偏振方向旋转器获得具有低偏振模色散的常导版本。 在输入和输出位于调制器的同一侧的反射模式下可以获得类似的结果。 使用GRIN镜头的版本特别适用于调制光纤到光纤的光纤。 该器件可以作为可变光衰减器，光开关或高速调制器操作，并且对输入光的偏振不敏感。 用于相缓凝剂的优选材料是热压陶瓷铅锆酸镧锆酸盐组合物。

    High-speed electro-optic modulator
    3.
    发明授权
    High-speed electro-optic modulator 失效
    高速电光调制器

    公开(公告)号：US06330097B1

    公开(公告)日：2001-12-11

    申请号：US09288439

    申请日：1999-04-08

    申请人： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

    发明人： Qiushui Chen ,  Gary Y. Wang ,  Paul Melman ,  Kevin Zou ,  Hua Jiang ,  Run Zhang ,  Jing Zhao ,  Dean Tsang ,  Feiling Wang

    IPC分类号： G02B2600

    CPC分类号： G02F1/055 ,  G02F1/0555 ,  G02F1/0556 ,  G02F2201/17 ,  G02F2203/06 ,  G02F2203/48

    摘要： An optical modulator is provided to control the intensity of a transmitted or reflected light. In a transmission mode, a separator splits arbitrarily polarized light into two polarization rays and one is made to travel a separate path from the other. A recombiner causes the two rays to recombine at an output unless an electro-optic phase retarder changes the polarization of the two rays, in which case, both of them miss the output by an amount which is a function of the voltage on the retarder. A normally-off version with low polarization mode dispersion is obtained by changing the orientation of the recombiner. A normally-on version with low polarization mode dispersion is obtained with a passive polarization direction rotator. Similar results can be obtained in a reflection mode where the input and output are on the same side of the modulator. Versions using a GRIN lens are particularly suited to modulation of light out of and back into fiber-optic cables. The device can be operated as a variable optical attenuator, an optical switch, or a high speed modulator and is insensitive to polarization of the input light. A preferred material for the phase retarder is a hot-pressed ceramic lead lanthanum zirconate titanate composition.

    摘要翻译： 提供光调制器以控制透射或反射光的强度。 在透射模式中，分离器将任意偏振光分离成两个偏振光，一个偏振光从另一个行进。 重组器会导致两条射线在输出端重新组合，除非电光相位延迟器改变两个射线的极化，在这种情况下，它们都将输出误差减去延迟器上的电压的函数。 通过改变重组器的取向，获得具有低偏振模色散的常关型。 使用无源偏振方向旋转器获得具有低偏振模色散的常导版本。 在输入和输出位于调制器的同一侧的反射模式下可以获得类似的结果。 使用GRIN镜头的版本特别适用于调制光纤到光纤的光纤。 该器件可以作为可变光衰减器，光开关或高速调制器操作，并且对输入光的偏振不敏感。 用于相缓凝剂的优选材料是热压陶瓷铅锆酸镧锆酸盐组合物。

    High-speed low-loss fiber-optic switches
    4.
    发明授权
    High-speed low-loss fiber-optic switches 失效
    高速低损耗光纤交换机

    公开(公告)号：US06229934B1

    公开(公告)日：2001-05-08

    申请号：US09158000

    申请日：1998-09-22

    申请人： Paul Melman ,  Yingyin Zou ,  Hua Jiang ,  Feiling Wang ,  Jing Zhao

    发明人： Paul Melman ,  Yingyin Zou ,  Hua Jiang ,  Feiling Wang ,  Jing Zhao

    IPC分类号： G02B626

    CPC分类号： G02B6/2848 ,  G02F1/31

    摘要： The invention provides a fiber-optic 2×2 switch using a dual-fiber 50:50 input coupler and a dual-fiber 50:50 output coupler. One fiber from each coupler makes contact to an inner transparent electrode on a planar layer of electro-optic material and the other fibers make contact to an outer transparent electrode on the layer. The electro-optic layer has its other side coated with a transparent electrode which is placed in optical contact with one end of a GRIN lens. The fibers are arranged so that the inner fibers are at conjugate points and the outer fibers also at conjugate points of the lens. The other end of the lens is coated with a mirror. Applying a voltage between either the inner or outer electrode changes the optical path length for the light from and to the fibers traveling through the material under the selected electrode causing the light from the two input fibers to be switched between the two output fibers. 2×N switches can be constructed by concatenating 2×2 switches. The switch can also be used as a modulator. A convenient fiber alignment method is described.

    摘要翻译： 本发明提供一种使用双光纤50:50输入耦合器和双光纤50:50输出耦合器的光纤2x2开关。 来自每个耦合器的一根光纤与电光材料的平面层上的内部透明电极接触，并且其它光纤与层上的外部透明电极接触。 电光层的另一侧涂有透明电极，该透明电极与GRIN透镜的一端放置成光学接触。 纤维布置成使得内纤维在共轭点处，外纤维也在透镜的共轭点处。 透镜的另一端涂有镜子。 在内部电极或外部电极之间施加电压改变来自穿过选定电极之下的材料的光的光路长度，从而使来自两个输入光纤的光在两个输出光纤之间切换。 2xN开关可以通过连接2x2开关构成。 开关也可以用作调制器。 描述了方便的光纤对准方法。

    High-speed polarization-insensitive electro-optic modulator
    5.
    发明授权
    High-speed polarization-insensitive electro-optic modulator 有权
    高速偏振不敏感电光调制器

    公开(公告)号：US06175667B1

    公开(公告)日：2001-01-16

    申请号：US09157999

    申请日：1998-09-22

    申请人： Feiling Wang ,  Yingyin Zou ,  Paul Melman ,  Hua Jiang

    发明人： Feiling Wang ,  Yingyin Zou ,  Paul Melman ,  Hua Jiang

    IPC分类号： G02F1035

    CPC分类号： G02F1/21 ,  G02B6/266 ,  G02F1/0311 ,  G02F1/0551 ,  G02F2203/02 ,  G02F2203/06 ,  G02F2203/48

    摘要： There is provided a device for use with fiber-optic cables for polarization insensitive amplitude modulation of light comprising a planar electro-optic layer with a reflective conductive mirror electrode on one side and a pair of transparent conductive electrodes on the other. The transparent conductive electrodes have a small separation along a straight line. A GRIN lens has one end in optical contact with the transparent conductive electrodes with its axis located over the line separating the electrodes. An input optical fiber and an output optical fiber are placed in optical contact with the other end of the lens at points which are symmetrically displaced from the axis of the lens. Light coming from input fiber is collimated by the GRIN lens and directed to the transparent electrodes, through the electro-optic layer and to the mirror from which it is reflected and refocused by the GRIN lens onto the output fiber. Applying a voltage between any of the transparent electrodes and the reflecting electrode changes the optical path length for half the beam so that when it is refocused on the output fiber, the two halves interfere constructively of destructively, depending on the change in path length. In one version, the electro-optic layer is a PLZT ceramic plate, while in others, it is a thick or thin film. In still other versions, two or more electro-optic layers are used in series in order to reduce the voltage required for the same optical path length change. A means to eliminate residual sensitivity to polarization sensitivity is described.

    摘要翻译： 提供了一种用于光的偏振不敏感幅度调制的光纤电缆的装置，包括在一侧具有反射导电镜电极的平面电光层和另一侧的一对透明导电电极。 透明导电电极沿着直线具有小的间隔。 GRIN透镜的一端与透明导电电极光学接触，其轴线位于分离电极的线上。 输入光纤和输出光纤被放置成与透镜的另一端在与透镜的轴对称位移的点处光学接触。 来自输入光纤的光由GRIN透镜准直，并通过电光层和反射镜引导到透明电极，并将其从GRIN透镜反射并重新聚焦到输出光纤上。 在任何透明电极和反射电极之间施加电压，改变光束的一半的光路长度，使得当它被重新聚焦在输出光纤上时，根据路径长度的变化，这两半的破坏性构造地相互干扰。 在一个版本中，电光层是PLZT陶瓷板，而在其它版本中，它是厚或薄的膜。 在其他版本中，串联使用两个或多个电光层，以便减少相同光程长度变化所需的电压。 描述了消除极化灵敏度的残余灵敏度的手段。

    Spatial light modulator
    6.
    发明授权
    Spatial light modulator 有权
    空间光调制器

    公开(公告)号：US06798550B1

    公开(公告)日：2004-09-28

    申请号：US09715867

    申请日：2000-11-17

    申请人： Feiling Wang ,  Kewen Kevin Li ,  Dean Tsang ,  Hua Jiang

    发明人： Feiling Wang ,  Kewen Kevin Li ,  Dean Tsang ,  Hua Jiang

    IPC分类号： G02F103

    CPC分类号： G02F1/0311 ,  G02F1/055 ,  G02F2001/213 ,  G02F2203/15

    摘要： A modulator formed with a solid state electro-optic material having a pixellated structure interconnected to a circuit on a semiconductor substrate. Silicon CMOS integrated circuit that can include random access memories (RAMs) are used as a substrate and interfaced to solid state electro-optic materials coated thereon. In particular, the electro-optic modulators are controlled by RAM cells to produce a modulation of reflected light. SRAMs can be used with connection to the SRAM cell flip-flop. DRAMs can be used with the modulator replacing the DRAM storage capacitor. The SLM thus formed can be connected to a digital computer and controlled as if were a being written to as a memory, but other IC structures can also be used. In order to enhance the modulation effects, the electro-optic material is used as the spacer for a Fabry-Perot etalon structure that is also deposited on the semiconductor substrate. PLZT is a suitable electro-optic material.

    摘要翻译： 由具有与半导体衬底上的电路互连的像素化结构的固体电光材料形成的调制器。可以包括随机存取存储器（RAM）的硅CMOS集成电路用作衬底并且与固态电光 涂覆在其上的材料。 特别地，电光调制器由RAM单元控制以产生反射光的调制。 SRAM可以连接到SRAM单元触发器。 DRAM可用于替代DRAM存储电容器的调制器。 如此形成的SLM可以连接到数字计算机，并且被控制好像被写入作为存储器，但也可以使用其他IC结构。 为了增强调制效果，电光材料被用作也沉积在半导体衬底上的法布里 - 珀罗标准具结构的间隔物。 PLZT是一种合适的电光材料。

    Cross-correlating PMD detector
    7.
    发明授权
    Cross-correlating PMD detector 失效
    交相关PMD检测器

    公开(公告)号：US06654105B2

    公开(公告)日：2003-11-25

    申请号：US10167121

    申请日：2002-06-10

    申请人： Feiling Wang ,  Xiao-Li Li ,  Yingyin Zou ,  Wei Hu

    发明人： Feiling Wang ,  Xiao-Li Li ,  Yingyin Zou ,  Wei Hu

    IPC分类号： G01N2100

    CPC分类号： G02F1/0555 ,  G02F1/0136

    摘要： A polarization mode dispersion center (306) measures PMD impairment through the cross-correlation of optical pulses. A second variable phase retarder plate (504) is oriented with polarization eigenstates at preferably 45 degree angle with respect to those eigenstates of a first variable phase retarder plate (502) to provide controllable phase retardations that can be varied and measured as an indication of PMD impairment.

    摘要翻译： 偏振模色散中心（306）通过光脉冲的互相关来测量PMD损伤。 相对于第一可变相位延迟板（502）的本征态，第二可变相位延迟板（504）以偏振本征态优选成45度角定向，以提供可改变和测量的可控相位延迟作为PMD的指示 减值。

    Ferro-electric azimuth rotator
    8.
    发明授权
    Ferro-electric azimuth rotator 有权
    铁电方位旋转器

    公开(公告)号：US06700694B2

    公开(公告)日：2004-03-02

    申请号：US10164866

    申请日：2002-08-14

    申请人： Yingyin Zou ,  Feiling Wang ,  Jingwen Zhang

    发明人： Yingyin Zou ,  Feiling Wang ,  Jingwen Zhang

    IPC分类号： G02F109

    CPC分类号： G02F1/0555 ,  G02F1/0136 ,  G02F1/21 ,  G02F2001/212 ,  G02F2202/40 ,  G02F2203/055 ,  G02F2203/48

    摘要： An electrically controllable azimuth optical rotator (10) includes a first quarterwave plate (16) for receiving a first beam of electromagnetic energy (22) having a first arbitrary polarization state, and outputting a second beam (122) in response to the first quarterwave plate (16). An electric voltage controlled ferro-electric variable phase retarder (20) aligned at approximately 45 degrees to the first quarterwave plate (16) receives the second beam 122 and provides a third beam 38 in response to the retarder (20). The electric voltage controlled ferro-electric variable phase retarder (20) is characterized by a phase shift of &phgr;=2&agr;, where &agr; is a desired angle of rotation of the first arbitrary polarization state. To provide a voltage-controlled rotation, a second quarterwave plate (18) is aligned either parallel or perpendicular to the first quarterwave plate (16) for receiving the third beam (38) and outputting a fourth beam (46) in response to the retarder (20). As a result, the fourth beam (46) has a polarization state similar to the first arbitrary polarization state but rotated by &agr;.

    摘要翻译： 电可控方位光旋转器（10）包括用于接收具有第一任意偏振状态的第一电磁能束（22）的第一四分之一波片（16），并响应于第一四分之一波片输出第二光束（122） （16）。 与第一四分之一波片（16）大致45度对准的电压控制铁电可变相位延迟器（20）接收第二光束122并响应于延迟器（20）提供第三光束38。 电压控制铁电可变相位延迟器（20）的特征在于phi = 2alpha的相移，其中α是第一任意偏振态的期望的旋转角。 为了提供电压控制的旋转，第二四分之一波片（18）被平行或垂直于第一四分之一波片（16）对准，用于接收第三波束（38）并响应于延迟器输出第四波束（46） （20）。 结果，第四光束（46）具有与第一任意偏振态类似的旋转α的极化状态。